PHYS07200604007 Manas Kumar Dala - Homi Bhabha National ...
PHYS07200604007 Manas Kumar Dala - Homi Bhabha National ...
PHYS07200604007 Manas Kumar Dala - Homi Bhabha National ...
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Experimental Techniques 52<br />
Figure 2.19: Optical layout of the WERA soft x-ray beam line, ANKA.<br />
2 (vertical) to focus the incoming beam into the entrance slit of the grating box<br />
and also a pair of bendable focusing mirrors after the exit slit for optimum focus at<br />
sample position. Both entrance and exit slits are movable. The energy resolution<br />
∆E/E < 10 −4 . The photon energy range is 100 - 1500 eV. The experimental facilities<br />
associated with the WERA soft x-ray beamline are PES, PEEM, NEXAFS and<br />
SXMCD.<br />
The BEAR beamline at ELETTRA is dedicated to the study of optical, electronic<br />
and magnetic properties of materials under UHV condition. The lay out of the BEAR<br />
beam line is shown in the Fig. 2.20. The beamline optics is based on a couple of<br />
parabolic mirrors. The radiation is collimated by the first parabolic mirror (P1). The<br />
parallel beam produced by P1 reaches the monochromator stage based on the plane<br />
grating/plane mirror scheme according with the Naletto-Tondelo scheme [53]. There<br />
are three gratings (G-NIM, G-1200 and G1800) associated with the monochromator.<br />
Three gratings cover 5 - 1600 eV photon energy range. The G-NIM (1200 1/mm)<br />
works at near normal incidence to cover the 5 - 45 eV region. The G1200 (1200 1/mm)<br />
and G1800 (1800 1/mm) work in the 45 - 1600 eV energy range. The monochromatic<br />
radiation is focused onto the exit slit by a second parabolic mirror (P2). The elliptical<br />
re-focusing mirror (REFO) brings the beam at the sample position. The experimental